摘要
本文在乙醇／水（体积比１：８）混合溶剂中，用偏最小、二乘紫外分光光度法同时测定了甲酚的三个同分异构体。在２５０－２８５ｎｍ波长范围内，浓度为０—７０ｕｇ／ｍＬ的三种甲酚均遵守比耳定律。邻、间、对甲酚的最大吸收波长分别为２７０．５，２７１．５和２７７ｎｍ，相应的摩尔吸光系数为１．５６×１０￣３、１．３８×１０￣３和１．６５×１０￣３。测定合成样和工业甲酚的结果相对标准偏差均小３．５％，１／ｍｏｌ·ｃｍ。这个结果符合微量分析要求。
In this paper, simultaneous determination of cresol isomers,e.g ortho-,meta-,and para- cresol,was made with partial Least Squares(PLS)ultraviolet spectrop hotometric method in complex solvent which consists of alcohol and water in volume ratio of to 8.All isomers obey the Beer's law from o to 70 ug/ml among the wave length range from 250 to 285 nm,In the complex solvent,maximum absorption wave lengthes of ortho-,meta-and para-cresol are 270.5.271.5 and277nm,respective1y,and their corresponding mo lar absorptivities are 1.56×10￣3.1.38×10￣3 and1.65×10￣3L/(mol.cm),The relative standard deviations of determining synthetic samples and industrial cresol are all smaller than 3.5%,which is satisfied in microanalysis.
出处
《赣南师范学院学报》
1994年第5期73-76,共4页
Journal of Gannan Teachers' College(Social Science(2))
关键词
偏最小二乘法
紫外分光光度法
甲酚
partial Least Squares
Ultraviolet spectrophotometaic method
cresol
